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Update R using RStudio
...ork for you, try using installed.packages()
to find the proper pathnames.]
now you can update your packages by typing update.packages() in your RStudio console, and answering 'y' to all of the prompts.
> update.packages(checkBuilt=TRUE)
class :
Version 7.3-7 installed in /Library/Frameworks/R.f...
Shuffling a list of objects
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@CharlieParker: Not that I know of. You could use random.sample(x, len(x)) or just make a copy and shuffle that. For list.sort which has a similar issue, there's now list.sorted, but there's not a similar variant for shuffle.
– to...
Run cURL commands from Windows console
...ble, but rather just need to e.g. see or save the results of a GET request now and again, can use powershell directly. From a normal command prompt, type:
powershell -Command "(new-object net.webclient).DownloadString('http://example.com')"
which, while a bit wordy, is similar to typing
curl htt...
Greedy vs. Reluctant vs. Possessive Quantifiers
...acks one more step (leaving the "foo" at the end of the string unmatched). Now, the matcher finally matches the f in the regex, and the o and the next o are matched too. Success!
A reluctant or "non-greedy" quantifier first matches as little as possible. So the .* matches nothing at first, leaving ...
Is Javascript compiled or an interpreted language? [closed]
...ng like an interpreter, and most major JS engines feature JIT compilers by now. Thus, saying that "JavaScript is interpreted" is obviously wrong (or maybe your definition of interpreter/compiler is).
– user395760
Mar 10 '12 at 8:26
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Fastest way to get the first object from a queryset in django?
...'m pretty sure you'll even see this add LIMIT 1 to the query, and I don't know that you can do any better than this. However, internally __nonzero__ in QuerySet is implemented as try: iter(self).next() except StopIteration: return false... so it doesn't escape the exception.
–...
Printing without newline (print 'a',) prints a space, how to remove?
...ly make a single call to print. Note that string concatenation using += is now linear in the size of the string you're concatenating so this will be fast.
>>> for i in xrange(20):
... s += 'a'
...
>>> print s
aaaaaaaaaaaaaaaaaaaa
Or you can do it more directly using sys.std...
Which Android IDE is better - Android Studio or Eclipse? [closed]
.... Which IDE should I use - Android Studio or Eclipse sdk?
I would like to know which one is better.
5 Answers
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How to initialize a two-dimensional array in Python?
...t comprehension:
x = [[foo for i in range(10)] for j in range(10)]
# x is now a 10x10 array of 'foo' (which can depend on i and j if you want)
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Prevent automatic browser scroll on refresh
... distinguish between user initiated scroll and browser initiated. I don't know how to do this, but as I recall it is possible.
– mrtsherman
Aug 12 '11 at 5:12
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